"The attention is to be kept pure."

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Now when you meditate, try to meditate in a sustained way, first of all sustain it. Then you find that you are getting into the state of Samadhi, means at a state where you start feeling the joy and the bliss of God's blessings, and then you start saying "O God, what a blessing, what a blessing, and what a blessing". Once you have reached that state then you have to realize "Who am I". Who are you? What are you? You are the Spirit. After establishing your sustained attention on the Spirit you'll develop a state where you'll be in a complete state of witnessing with joy.

— Nirmala Srivastava