Regret
Regret or remorse of the wrong we have done should be in a positive spirit of changing, turning towards God with humility.
Result of Hearing Very Strictly
Unless we hear very strictly with great faith to the order of our Spiritual Master, we will not understand what is the mercy of Krishna and how it is coming upon us.
Serving Guru’s Instructions
When we speak of the dust of the lotus feet of the Spiritual Master, we are speaking of humble approach to serve his instructions. Unless we humbly serve the instructions of the great soul, it is Krishna's arrangement the He never reveals Himself.
Faith Showing Us The Way
No amount of study of scriptures, austerity or charity can help us know God. The only way is to follow the footsteps of saintly people. When we have faith in that, that faith shows us the way.