“Your word is a lamp for my feet, a light on my path” Psalms 119:105 NIV italics and emphasis mine
If I ask you to arrange furniture in a dark room, you will have so much difficulty—take too long, hurt yourself and perhaps others in the process. Yet, if I simply switch on the light, then a once daunting task suddenly becomes simple and straight-forward.
We hurt ourselves (and others) and take too long attempting to build our life in absence of the light (God's word). You want to start business, get a promotion, marry or generally succeed in life—switch on the light i.e. find what God has to say about it and do it His way.