Concentration of the mind is in a way common to both Knowledge and Yoga. Yoga aims at union of the individual with the universal, the Reality. This Reality cannot be new. It must exist even now, and it does exist.

The ego's phenomenal existence is transcended when you dive into the source from where the `I'-thought rises

The solution to your problem is to see who has it.

He who has realized the Self in the Heart has transcended the dualities and is never perplexed.

The 'I' casts off the illusion of the 'I' and yet remains 'I'. Such is the paradox of Self-realization. The Realized do not see any paradox in it. Consider the case of the worshipper. He approaches God and prays to be absorbed in Him. He then surrenders himself in faith and by concentration. And what remains afterwards? In the place of the original 'I', self-surrender leaves a residuum of God in which the 'I' is lost. That is the highest form of devotion or surrender and the peak of detachment.

Unless one is happy, one cannot bestow happiness on others.

Consciousness is indeed always with us. Everyone knows 'I am!' No one can deny his own being.