That passage (and the ensuing verses) was directed at Gentile Christians from Rome, and was instructing them to tolerate Jewish Christians who still maintained strict obedience to Jewish religious ritualistic concerns such as dietary laws. Contextually-speaking, those verses have nothing to do with “finding the truth”, but rather simply to tolerate Jewish Christians. Sure, it’s a feel-good verse which one can isolate and apply however they feel, but it had a specific context which bears acknowledging.
OM
ALL Christians are trained by God's Word...
"For all the things that were written beforehand were written for our instruction, so that through our endurance and through the comfort from the Scriptures we might have hope." Romans 15:4
All Scripture is inspired of God and beneficial for teaching, for reproving, for setting things straight, for disciplining in righteousness, so that the man of God may be fully competent, completely equipped for every good work." 2 Timothy 3:16,17