If you have dedicated your life to your God, should you lead by example or push your message onto people?

All have heard. Read Romans 1:

"Because that which may be known of God is manifest in them; for God hath shewed it unto them.
20 For the invisible things of him from the creation of the world are clearly seen, being understood by the things that are made, even his eternal power and Godhead; so that they are without excuse:
21 Because that, when they knew God, they glorified him not as God, neither were thankful; but became vain in their imaginations, and their foolish heart was darkened.
22 Professing themselves to be wise, they became fools,
23 And changed the glory of the uncorruptible God into an image made like to corruptible man, and to birds, and fourfooted beasts, and creeping things.
24 Wherefore God also gave them up to uncleanness through the lusts of their own hearts, to dishonour their own bodies between themselves:
25 Who changed the truth of God into a lie, and worshipped and served the creature more than the Creator, who is blessed for ever. Amen.
26 For this cause God gave them up unto vile affections: for even their women did change the natural use into that which is against nature:
27 And likewise also the men, leaving the natural use of the woman, burned in their lust one toward another; men with men working that which is unseemly, and receiving in themselves that recompence of their error which was meet.
28 And even as they did not like to retain God in their knowledge, God gave them over to a reprobate mind, to do those things which are not convenient;
29 Being filled with all unrighteousness, fornication, wickedness, covetousness, maliciousness; full of envy, murder, debate, deceit, malignity; whisperers,
30 Backbiters, haters of God, despiteful, proud, boasters, inventors of evil things, disobedient to parents,
31 Without understanding, covenantbreakers, without natural affection, implacable, unmerciful:
32 Who knowing the judgment of God, that they which commit such things are worthy of death, not only do the same, but have pleasure in them that do them."

He has already showed them, but they did not want to "retain God in their conscience."

Most grown adults in our world no longer react the same way to fear and force, in the old days when the world was more ignorant and there were only a few "elite" intellectuals, it was easy to force the word whatever religion with the use of fear and intimidation, people were less knowledgeable about the world and more likely to believe what they were told, especially if it was from authority.

These days it's usually only children that these tactics work on, if you want to show people how your religion or philosophy has improved your life and will improve theirs, then lead by example. Be kind, be smart, be brave, be the kind of person that others admire and respect, the kind of person that others would want to follow, only then will you be able to convince anyone that this lifestyle is good.

Being angry, hateful, greedy, bitter, willfully ignorant and violent, do not generally convince anyone to believe that anything good comes from your lifestyle or religion. Saying one thing and acting the other just doesn't work, people will see right through it.

That being said, one of my friends turned towards Buddhist practices some time ago, I've noticed she's let go of many unhealthy habits, seems to be stronger mentally and physically (Has gotten in really good shape) and in general have a much more calm attitude towards everything, she used to be quite stressed and overwhelmed over things that went wrong, now she seems to be able to accept everything as it is. I think she's one of the only people I know who turned towards a philosophy and actually gained positive outcomes from it that don't seem insanely superficial.