The word, Chintā, is derived from the root – चिन्त् meaning - to think, consider, reflect, ponder over; and by itself means – thinking, thought, sad or sorrowful thought, reflection, consideration, anxiety
Nature
Chintā is one of thirty-three Vyabhichāri bhavas, the transient feelings which rise irregularly and support the permanent basic sentiments, because of their fleeting nature they are also called sanchāri bhavas. Manas, which is the ordinary mental equipment of the individual, is the perceiving and arranging mind. In Samkhya system it refers to the personal organ of thought, not diffused like theātman but localized in the individual. Manas has its own illumination which gives man awareness or consciousness, faculties of perception, thought, imagination and volition. Chintā is the faculty whereby the current of thought dwells, thinks and contemplates upon the subject so recalled by Samarnam, and previously known and determined by buddhi
Implication
Rishi Shant Vaikhānsa of the Rig Veda in a mantra addressed to Soma tells us that when the material darkness is dispelled by the powerful purifying light emanating from the divine source, coinciding therewith is also the destruction of the darkness of the mind , then that light which is Brahman is seen which delivers the yogins beyond all folds of existence, which existence with reference to the body is gross but is subtle with reference to the mind. The epithet – Soma as the ever glowing one, is used with regard to Agni, Aditya and Brahman. Sankara in his Vivekachudamani uses the term – चिन्ताशून्यम् as meaning without anxiety or worry. Chinmayananda Saraswati explains that it refers to the man of perfection to whom no thought comes to mind so as to disturb and destroy him because worry cannot reach him who refuses to worry. In Vedanta, Chinta, along with and therefore interconnected with vāsanā and karma, is a factor which represents the chain of causation. Chinta and karmas create powerful vasanas and by themselves are the effects of vasanas. Vasanas are not destroyed if chinta and karmas are not destroyed.
Significance
in his Karika on the Mandukya Upanishad explains that all that there is, is perceived by the mind; when the mind ceases to be duality is not perceived; the mind ceases to think as a consequence of the realisation of the Truth that it is the Self, it becomes a non-perceiver. Truth is known through knowledge and both are birth-less; the mind that does not lose itself when under control becomes the fearless Brahman possessed of the light of Consciousness; then all mentation stops, he states:- In this verse, the wordchinta derived in the sense of that by which things are thought of, means - the intellect. Gaudapada calls the moment of direct apprehension of the Paramatman the state of the highest Samadhi in which all talk is at an end, all anxiety is at an end. The learned people are those who are aware of the existence of Truth, and the enlightened one are those who have in their own way personally experienced, both know about the true nature of Truth.