True silence is really endless speech. - Ramana Maharshi

If other thoughts rise, one should, without attempting to complete them, enquire, 'To whom did they arise?', it will be known 'To me'. If one then enquires 'Who am I?', the mind (power of attention) will turn back to its source. By repeatedly practising thus, the power of the mind to abide in its source increases.

21. During that time, the embodied person does not know the attainment in the heart. It is known in the Samadhi. The difference in name is due to the difference in cause.

Surrender is giving oneself up to the original cause of one's being. Do not delude yourself by imagining this source to be some God outside you. One's source is within oneself. Give yourself up to it. That means that you should seek the source and merge in it. Because you imagine yourself to be out of it, you raise the question, 'Where is the source'?