<p>Well, the grammar is kind of messed up anyway. You need to fix your pronouns, and I would add a "that" after "me" and before "success."</p>
<p>Maybe something more personal:
Because of #####, I have learned that success is not what I have but what I have done, so I will [what you will do in the future with this new lesson]</p>
<p>I'm not sure. I can't really fix a sentence without knowing the background and the previous sentence. Just write something that flows with the previous sentence and says what you want it to.</p>
<p>The problem with your sentence is that it's not saying anything. Be specific. State your examples and leave the armchair philosopher at home. If what you're saying is truly eye-opening or important, it'll show.</p>
<p>corranged is right when he says that it is difficult to make a suggestion out of context. With that said, I'll make a suggestion just because I like working with words. I was thinking something along these lines might sound a little better:</p>
<p>From ####, I have learned what success means to me. While I used to believe that personal success was merely a measure of one's possessions, I now understand that the only way I will ever succeed is by making a difference in the lives of others.</p>
<p>Still sounds a little dry. it should be more personal than the original though, as corranged said.</p>