If one does not know to which port one is sailing, no wind is favourable.
– Seneca

Alice: “Would you tell me, please, which way I ought to go from here?” 
Cheshire Cat: “That depends a good deal on where you want to get to.”
Alice: “I don’t much care where –”
Cheshire Cat: “Then it doesn’t matter which way you go.”
– Lewis Carroll

Because strait is the gate, and narrow is the way, which leadeth unto life, and few there be that find it.
– Jesus Christ (Matthew 7:14)

I am the way, the truth, and the life: no man cometh unto the Father, but by me.
– Jesus Christ (John 14:6)