….When the Peace of God descends on you, when the Divine Presence is there within you, when the Ananda rushes on you like a sea, when you are driven like a leaf before the wind by the breath of the Divine Force, when Love flows out from you on all creation, when Divine Knowledge floods you with a Light which illumines and transforms in a moment all that was before dark, sorrowful and obscure, when all that is becomes part of the One Reality, when the Reality is all around you, you feel at once by the spiritual contact, by the inner vision, by the illumined and seeing thought, by the vital sensation and even by the very physical sense, everywhere you see, hear, touch only the Divine. Then you can much less doubt it or deny it than you can deny or doubt daylight or air or the sun in heaven—for of these physical things you cannot be sure that they are what your senses represent them to be; but in the concrete experience of the Divine, doubt is impossible.
Sri Aurobindo – Letters on Yoga – I: CWSA, Vol. 28, pp. 338 -39
…. Yoga is not a field for intellectual argument or dissertation. It is not by the exercise of the logical or the debating mind that one can arrive at a true understanding of Yoga or follow it. A doubting spirit, “honest doubt” and the claim that the intellect shall be satisfied and be made the judge on every point is all very well in the field of mental action outside. But Yoga is not a mental field, the consciousness which has to be established is not a mental, logical or debating consciousness—it is even laid down by Yoga that unless and until the mind is stilled, including the intellectual or logical mind, and opens itself in quietude or silence to a higher and deeper consciousness, vision and knowledge, sadhana cannot reach its goal.…
If the spirit of doubt could be overcome by meeting it with arguments, there might be something in the demand for its removal by satisfaction through logic. But the spirit of doubt doubts for its own sake, for the sake of doubt; it simply uses the mind as its instrument for its particular dharma and this not the least when that mind thinks it is seeking sincerely for a solution of its honest and irrepressible doubts.….If anybody gets over his fundamental doubts, it is by the growth of the psychic in him or by an enlargement of his consciousness, not otherwise. Questions which arise from the spirit of enquiry, not aggressive or self-assertive, but as a part of a hunger for knowledge can be answered, but the “spirit of doubt” is insatiable and unappeasable.
Sri Aurobindo – Letters on Yoga – I: CWSA, Vol. 28, pp. 337 – 38
Doubt is not a sport to indulge in with impunity; it is a poison which drop by drop corrodes the soul.
The Mother – Words of the Mother – II: CWM, Vol. 14, p. 244
One of the chief functions of the physical mind is to doubt. If you listen to it, it will always find a thousand reasons for doubting. But you must know that the physical mind is working in ignorance and full of falsehoods.
The Mother – Words of the Mother – II: CWM, Vol. 14, p. 343
To be at once a passive and perfectly pure mirror, turned simultaneously without and within, to the results of the manifestation and the sources of this manifestation, so that the consequences may be placed before the guiding will, and to be also the realising activity of that will, this, more or less, is what a human being ought to be…. To combine these two attitudes of passive receptivity and realising activity is precisely the most difficult of all things. And that is what Thou expectest of us, O Lord, and as Thou dost expect it of us, there is no doubt that Thou wilt give us the means of realising it.
The Mother – Prayers and Meditations: CWM, Vol. 1, p.180
The sceptic Ray disrupted all that seems
And smote at the very roots of thought and sense.
In a universe of Nescience they have grown,
Aspiring towards a superconscient Sun,
Playing in shine and rain from heavenlier skies
They never can win however high their reach
Or overpass however keen their probe.
A doubt corroded even the means to think,
Distrust was thrown upon Mind’s instruments;
All that it takes for reality’s shining coin,
Proved fact, fixed inference, deduction clear,
Firm theory, assured significance,
Appeared as frauds upon Time’s credit bank
Or assets valueless in Truth’s treasury.
Sri Aurobindo – Savitri: CWSA, Vol. 33 , Book Two, p. 284