But the greater fact remains there is one truth and it's our job to search the Scriptures and find it, by the leading of the Holy Spirit.
And further, the truth is just not that difficult to grasp. Because of Adam's fall, all men sin and none are righteous. God, through His infinite mercy, chose to save some men by paying the penalty for those sins Himself and thus sent His Son to carry those transgressions to the cross. And to prove that it was God who accomplished this unmerited grace, Christ rose bodily from the tomb.
If we believe our sins have been forgiven by His grace through faith in Jesus Christ, then we may stand confidently before Him, acquitted of our sins and loved by God, who decreed all history from before the foundation of the world, according to His good pleasure alone for His glory alone.
Don't add to Christ words. Christ says we must beleive and be baptised. There is no explicit commandment to search Holy Scripture for what we beleive.
There is one truth and our 'job' as you put it; is to be baptised and to beleive that truth.
Further Christ mentions a way to tell whether our church is a good tree, or a bad one, and it's based on the fruit that comes out of it. If we practice the true faith it should be evident in our lives and how we conduct ourselves.