Whatever you do in life must be done as a service to the Divine and nobody else.
Whatever you are, think or feel, you are responsible for it to the Divine and to nobody else.
He is the sole Master of your being and your life. If in all sincerity you surrender entirely to Him He will take charge of you and your heart will be in peace.
Your work can never be good if you go on thinking of the next thing. For work, it is the present that is most important. The past should not drag you behind, the future should not pull you forward. You must be fully concentrated on the present, on what you are doing. You must be so concentrated on what you are doing that it is as if the salvation of the whole world depended only upon your work.