Bahá’u’lláh says there is a sign (from God) in every phenomenon: the sign of the intellect is contemplation and the sign of contemplation is silence, because it is impossible for a man to do two things at one time—he cannot both speak and meditate.
(‘Abdu’l-Bahá, Paris Talks, p. 174)
Every created thing in the whole universe is but a door leading into His knowledge, a sign of His sovereignty, a revelation of His names, a symbol of His majesty, a token of His power, a means of admittance into His straight Path.
(Bahá’u’lláh, Gleanings from the Writings of Bahá’u’lláh, p. 160)
Every time I lift mine eyes unto Thy heaven, I call to mind Thy highness and loftiness, and Thine incomparable glory and greatness; and every time I turn my gaze to Thine earth, I am made to recognize the evidences of Thy power and the tokens of Thy bounty. And when I behold the sea, I find that it speaketh to me of Thy majesty, and of the potency of Thy might, and of Thy sovereignty and Thy grandeur. And at whatever time I contemplate the mountains, I am led to discover the ensigns of Thy victory and the standards of Thine omnipotence.
(Bahá’u’lláh, Prayers and Meditations, CLXXVI, p. 272)
For every thing, however, God has created a sign and symbol, and established standards and tests by which it may be known. The spiritually learned must be characterized by both inward and outward perfections; they must possess a good character, an enlightened nature, a pure intent, as well as intellectual power, brilliance and discernment, intuition, discretion and foresight, temperance, reverence, and a heartfelt fear of God. For an unlit candle, however great in diameter and tall, is no better than a barren palm tree or a pile of dead wood.
(‘Abdu’l-Bahá, The Secret of Divine Civilization, p. 33)
For everything there is a sign. The sign of love is fortitude under My decree and patience under My trials.
(Bahá’u’lláh, The Arabic Hidden Words 48)
Know thou that every created thing is a sign of the revelation of God. Each, according to its capacity, is, and will ever remain, a token of the Almighty. Inasmuch as He, the sovereign Lord of all, hath willed to reveal His sovereignty in the kingdom of names and attributes, each and every created thing hath, through the act of the Divine Will, been made a sign of His glory. So pervasive and general is this revelation that nothing whatsoever in the whole universe can be discovered that doth not reflect His splendor. Under such conditions every consideration of proximity and remoteness is obliterated.... Were the Hand of Divine power to divest of this high endowment all created things, the entire universe would become desolate and void.
(Bahá’u’lláh, Gleanings from the Writings of Bahá’u’lláh, p. 184)