People search for joy everywhere not knowing that the Self is the source of all joy.
The source of your mind is love and whatever you do to go to that source, is spiritual practice.
Every little thing has a purpose, at the same time, it has no purpose because this whole thing is a game. It is the existence which is total, beyond purpose. So you can say, virtually there is no purpose. If at all you have to pin down to a purpose then the purpose of nature is to take you to the Source, is to remind you of the Source, connect you to your Source.
Mind without agitation is meditation. Mind in the present moment is meditation. Mind that has no hesitation, no anticipation is meditation. Mind that has come back home, to the source, is meditation. Mind that becomes no mind is meditation.
Space and silence are synonymous. Joy, fulfillment brings the silence. Desire brings noise. Silence is the cure, because in silence you come back to the source, and that creates joy.
A child does not try to know the mother, it simply has faith in her. In the same way, having faith in the Divine is the source of the greatest strength.