Don't imagine that you'll discover {the truth} by accumulating more knowledge. Knowledge creates doubt, and doubt makes you ravenous for more knowledge. You can't get full eating this way.
Nature forever puts a premium on reality. What is done for effect is seen to be done for effect; what is done for love is felt to be done for love. A man inspires affection and honor because he was not lying in wait for these.
On love, not harming others, and respecting all beings. Even animals have these elements in their behavioral patterns. We should start by observing how animals act. They are honest and appreciate it when we are honest with them. If you present something nice to an animal in one hand while hiding a rope in the other, the creature will know your intention. Yet animals have no religion, no constitution. Basic nature has endowed them with the faculty of discernment. It is the same for humans.
Buddha renounced every worldly happiness because he wanted to share with the whole world his happiness which was to be had by men who sacrificed and suffered in the search for truth.
...And these vicissitudes come best in youth;
For when they happen at a riper age,
People are apt to blame the Fates, forsooth,
And wonder Providence is not more sage.
Adversity is the first path to truth:
He who hath proved war, storm, or woman's rage,
Whether his winters be eighteen or eighty,
Has won experience which is deem'd so weighty.