When you know God as peace within, then you will realize Him as peace existing in the universal harmony of all things without.

Consider whether fulfillment of the goal you have chosen will constitute success. What is success? If you possess health and wealth, but have trouble with everybody (including yourself), yours is not a successful life. Existence becomes futile if you cannot find happiness. When wealth is lost, you have lost a little; when health is lost, you have lost something of more consequence; but when peace of mind is lost, you have lost the highest treasure.

Consider no one a stranger. Learn to feel that everybody is akin to you.

The Bhagavad-Gita is where God Himself talks to His devotee Arjuna.

Happiness lies in making others happy, in forsaking self-interest to bring joy to others.

Have the unflinching determination to move on your path unhampered by limiting thoughts of past errors.

The way to liberation lies through this realization of the Self, by God-communion and by remaining in this God-aware state of the soul while performing dutiful actions. Any individual can reach this supreme actionless state by the renunciation of all fruits of actions: performing all dutiful acts without harbouring in his heart any likes and dislikes, possessing no material desires, and feeling God, not the ego, as the Doer of all actions.