Capacity

And now, concerning thy question regarding the creation of man. Know thou that all men have been created in the nature made by God, the Guardian, the Self-Subsisting. Unto each one hath been prescribed a pre-ordained measure, as decreed in God's mighty and guarded Tablets.

Bahá’u’lláh, Gleanings from the Writings of Bahá’u’lláh, p. 149

Let none, therefore, consider the largeness or smallness of the receptacle. The portion of some might lie in the palm of a man's hand, the portion of others might fill a cup, and of others even a gallon-measure.

Bahá’u’lláh, Gleanings from the Writings of Bahá’u’lláh, p. 8

But the lack of capacity and merit in the Day of Judgment does not prevent one from bounty and generosity, for it is the day of grace and not justice, and to give every one his due is justice.

‘Abdu’l-Bahá, Bahá’í World Faith, p. 360

Capacity is of two kinds, natural capacity and acquired capacity. The first, which is the creation of God, is purely good -- in the creation of God there is no evil; but the acquired capacity has become the cause of the appearance of evil. For example, God has created all men in such a manner, and has given them such a constitution and such capacities, that they are benefited by sugar and honey, and harmed and destroyed by poison. This nature and constitution is innate, and God has given it equally to all mankind. But man begins little by little to accustom himself to poison, by taking a small quantity each day, and gradually increasing it, until he reaches such a point that he cannot live without a gram of opium every day. The natural capacities are thus completely perverted. Observe how much the natural capacity and constitution can be changed, until by different habits and training they become entirely perverted. One does not criticize vicious people because of their innate capacities and nature, but rather for their acquired capacities and nature.

‘Abdu’l-Bahá, Bahá’í World Faith, p. 320

Consequently, do not look upon thy capacity, nay, rather, look upon the infinite grace of the Bounty of Abhá whose grace is comprehending and whose bounty is perfect.

‘Abdu’l-Bahá, Bahá’í World Faith, p. 360

Consider not thy capacity and merit, nay rather consider the grace of thy Lord, the Clement, the Merciful. Verily, thy Lord confirmeth whomsoever He willeth of His servants, through the glad-tidings of the Kingdom, the signals of clemency and the spiritual fragrances.

‘Abdu’l-Bahá, Tablets of ‘Abdu’l-Bahá v3, p. 607-609