There is pollution everywhere, as man's mind has become polluted. If mind becomes pure, everything else will become pure. So, cleanse your mind. Drive out all your worries. Past is past, forget it.
Future is uncertain.
Don't worry about your future. Present is very important. This is omnipresent, not ordinary present. So, make the best use of present and be happy. Devotion does not merely mean reading sacred texts and undertaking rituals.