Thought and science follow their own law of development; they are slowly elaborated in the growth and forward pressure of humanity, in what Shakespeare calls ... The prophetic soul / Of the wide world dreaming on things to come. Matthew Arnold.
Thought discovered is the more possessed. Young.
Thought disturbs the world, and thought of 40 God / Unsettles most of all; for it is life, / And only life can comprehend its force, / Or guide it. Dr. W. Smith.
Thought expands, but lames; action animates, but narrows. Goethe.
Thought is deeper than all speech; / Feeling deeper than all thought; / Souls to souls can never teach / What unto themselves was taught. C. P. Cranch.
Thought is free. As You Like It, i. 3.
Thought is like opium: it can intoxicate us while it leaves us broad awake. Amiel.
Thought is silence. Sheridan. 45
Thought is the property of him who can entertain it, and of him who can adequately place it. Emerson.
Thought is the seed of action; but action is as much its second form as thought is its first. It rises in thought, to the end that it may be uttered and acted. The more profound the thought, the more burdensome. Always in proportion to the depth of its sense does it knock importunately at the gates of the soul, to be spoken, to be done. Emerson.