Heartache is good. Accept it joyously. Allow it, don't repress it. The natural tendency of the mind is to repress anything that is painful. By repressing it you will destroy something that is growing. The heart is meant to be broken. It's purpose is to melt into tears and evaporate. When the heart has evaporated exactly in the same place where the heart was, you come to know the deeper heart.
Walk, but make walking a meditation; walk knowingly Breathe, but let your breathing become a constant meditation; breathe knowingly. The breath going in: watch it. The breath going out: watch it. Eat, but eat with full awareness. Take a bite, chew it, but go on watching. Let the watcher be there in every moment, whatsoever you are doing.
Don't hanker for the other world. Live this world, and live it with intensity, with passion. Live it with totality, with your whole being. And out of that whole trust, out of that life of passion, love, and joy, you will become able to go beyond.
The technique of positive thinking is not a technique that transforms you. It is simply repressing the negative aspects of your personality. It is a method of choice. It cannot help awareness; it goes against awareness. Awareness is always choiceless.
One day you will disappear on a funeral pyre - just into nothingness, as smoke. Don't get attached to anything. This attachment takes you away from your real being; you become focused on the thing to which you are attached. Your awareness gets lost in things, in money, in people, in power. And there are a thousand and one things, the whole thick jungle around you, to be lost in. Remember, non-attachment is the secret of finding yourself, then awareness can turn inwards because you don't have anything outside to catch hold of. It is free, and in this freedom you can know your self-nature.