Know thou…that the decrees of the Sovereign Ordainer, as related to fate and predestination, are of two kinds. Both are to be obeyed and accepted. The one is irrevocable, the other is…impending. To the former all must unreservedly submit, inasmuch as it is fixed and settled. God, however, is able to alter or repeal it. As the harm that must result from such a change will be greater than if the decree had remained unaltered, all, therefore, should willingly acquiesce in what God hath willed and confidently abide by the same. The decree that is impending, however, is such that prayer and entreaty can succeed in averting it.

Bahá’u’lláh, Gleanings from the Writings of Bahá’u’lláh, p.132

Fate is of two kinds: one is decreed, and the other is conditional or impending. The decreed fate is that which cannot change or be altered, and conditional fate is that which may occur. So, for this lamp, the decreed fate is that the oil burns and will be consumed; therefore, its eventual extinction is a decree which it is impossible to alter or to change because it is a decreed fate. In the same way, in the body of man a power of life has been created, and as soon as it is destroyed and ended, the body will certainly be decomposed, so when the oil in this lamp is burnt and finished, the lamp will undoubtedly become extinguished. But conditional fate may be likened to this: while there is still oil, a violent wind blows on the lamp, which extinguishes it. This is a conditional fate. It is wise to avoid it, to protect oneself from it, to be cautious and circumspect. But the decreed fate, which is like the lamp is burnt and finished, the lamp will undoubtedly become extinguished.

‘Abdu’l-Bahá, Some Answered Questions, p.244

Question. -- If God has knowledge of an action which will be performed by someone, and it has been written on the Tablet of Fate, is it possible to resist it?

Answer. -- The foreknowledge of a thing is not the cause of its realization; for the essential knowledge of God surrounds, in the same way, the realities of things, before as well as after their existence, and it does not become the cause of their existence. It is a perfection of God. But that which was prophesied by the inspiration of God through the tongues of the Prophets, concerning the appearance of the Promised One of the Bible, was not the cause of the manifestation of Christ.

The hidden secrets of the future were revealed to the Prophets, and They thus became acquainted with the future events which They announced. This knowledge and these prophecies were not the cause of the occurrences. For example, tonight everyone knows that after seven hours the sun will rise, but this general foreknowledge does not cause the rising and appearance of the sun.

Therefore, the knowledge of God in the realm of contingency does not produce the forms of the things. On the contrary, it is purified from the past, present and future. It is identical with the reality of the things; it is not the cause of their occurrence.

In the same way, the record and the mention of a thing in the Book does not become the cause of its existence. The Prophets, through the divine inspiration, knew what would come to pass. For instance, through the divine inspiration They knew that Christ would be martyred, and They announced it. Now, was Their knowledge and information the cause of the martyrdom of Christ? No; this knowledge is a perfection of the Prophets and did not cause the martyrdom.

The mathematicians by astronomical calculations know that at a certain time an eclipse of the moon or the sun will occur. Surely this discovery does not cause the eclipse to take place. This is, of course, only an analogy and not an exact image.

‘Abdu’l-Bahá, Some Answered Questions, p. 137

Some things are subject to the free will of man, such as justice, equity, tyranny and injustice, in other words, good and evil actions; it is evident and clear that these actions are, for the most part, left to the will of man. But there are certain things to which man is forced and compelled, such as sleep, death, sickness, decline of power, injuries and misfortunes; these are not subject to the will of man, and he is not responsible for them, for he is compelled to endure them. But in the choice of good and bad actions he is free, and he commits them according to his own will.

‘Abdu’l-Bahá, Some Answered Questions, p 248

Thou hadst asked about fate, predestination and will. Fate and predestination consist in the necessary and indispensable relationships which exist in the realities of things. These relationships have been placed in the realities of existent beings through the power of creation and every incident is a consequence of the necessary relationship. For example, God hath created a relation between the sun and the terrestrial globe that the rays of the sun should shine and the soil should yield. These relationships constitute predestination, and the manifestation thereof in the plane of existence is fate. Will is that active force which controlleth these relationships and these incidents. Such is the epitome of the explanation of fate and predestination. I have no time for a detailed explanation. Ponder over this; the reality of fate, predestination and will shall be made manifest.

‘Abdu’l-Bahá, Selections from the Writings of ‘Abdu’l-Bahá, p. 198

Whatever hath befallen you, hath been for the sake of God. This is the truth, and in this there is no doubt. … If, however, for a few days, in compliance with God’s all-encompassing wisdom, outward affairs should run their course contrary to one’s cherished desire, this is of no consequence and should not matter.

Universal House of Justice, Messages 1963 to 1986, p.610