Many actions, opportunities, and the relationship we build without knowing about the end. What drives us towards them is self-belief, mutual liking, shared goal or a deep sense of immersion.
Why do at an early age elder brother joins a monastery to renounce his worldly please or becomes a monk?
What drives us falling in love with someone just over a cup of coffee or a glimpse of him or her an event?
One has to have a Leap of faith in life at one or the other instance. We cannot avoid it.