The best way to cleanse the heart and prepare for the stilling of the mind is to lead a normal, worldly life. Living in the midst of your day-to-day duties, responsibilities, likes, dislikes, etc., will help you. All these become the very means for the purification of your heart.
Worry has never done anyone any good, and it is very much worse than mere dissipation of psychic energy, for it substantially curtails the joy and fullness of life.
