He is the way, the way, the truth. 

An open mind for too many people means 'multiple truths'..and eventually for them "no truth", no struggle toward the truth. 

He gave us some clear truths to help us find the way.  Thou shall not kill. etc. 

It's up to us to use good means, and a good number of them, to discern what His 'way' is, what His 'truth' is.

Some of the 'means' we need to use are: prayer, the Sacraments, Church teaching, natural law, our intellect, sound criteria so that our moral decisions aren't swayed by mere and vacillating emotions.   

We should build up human virtues, which are forms or types of particular strengths to help us do the good.