There
are always negative forces opposing satsang and meditation. In the
Ramayana it is written "indriya dwar gharokha nana/tana-tahan sur
baithey kari thana/aawat dekhi vishay banjari/tey jhat det kapat
ughari". It says that the senses are like doors and windows which are
guarded by various deities. For example, you are sitting in meditation
and sense-stimuli come to you as if on the wind. Your eyes open to
look around, your ears pick up sounds, your nose perceives good and bad
smells. No matter how hard you try to overcome them, these gates of the
senses take you away from meditation. They have other things they
prefer to spirituality. They do all they can to prevent you from
achieving liberation, so that you are stuck in the cycle of
reincarnation and they have a vehicle for indulging themselves.