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.
Meher BabaWhen longing is most intense separation is complete, and the purpose of separation, which was that Love might experience itself as Lover and Beloved, is fulfilled; and union follows. And when union is attained, the lover knows that he himself was all along the Beloved whom he loved and desired union with; and that all the impossible situations that he overcame were obstacles which he himself had placed in the path to himself. To attain union is so impossibly difficult because it is impossible to become what you already are! Union is nothing other than knowledge of oneself as the Only One.
Meher Baba