There is no mind to control if you realise the self. The mind having vanished, the self shines forth. In the realised man, the mind may be active or inactive, the self remains for him.

The world is illusory, Only Brahman is real, Brahman is the world

Meditation is sticking to one thought. That single thought keeps away other thoughts; distraction of mind is a sign of its weakness; by constant meditation it gains strength.

Meditation applies the brakes to the mind.

Self-inquiry is the process and the goal also. 'I am' is the goal and the final reality. To hold to it with effort is self-inquiry. When spontaneous and natural it is realization.

He whose pure mind turns inward and searches whence does this 'I' arise, knows the Self and merges in You, the Lord, as a river into the sea.

Such happiness is relative and is better called pleasure or satisfaction.