Christian definition of success is following God's will and bearing fruits for the Kingdom of God, which is winning souls for Jesus 

In my mind, you hit a major note. Fruits result from obeying His commands. See John 14:21-23.

Sharing the gospel is one of His commands.

and probably reaching as many souls for the Kingdom of God as you can is one of the definitions of success 

also success for Christians is when other people see you are different - they see that you are not the same, and they start wondering why is that and start asking you - that's when you get an opportunity to tell them about Jesus...

Well put, Yulia, yes, I agree.

I would also say that when the name of God is glorified it is also a success. When someone gets healed, for example! It is a success, isn't it? 

How true and powerful!

when you have a good influence on your non-Christian friends - it is quite a success. when they respect your opinion and come to you for help - it is a great success because you get an opportunity to tell them about Jesus

I believe that a good measure of "success" is detachment, joy, having the light of God shine through you, profound humility.  In short, true success is when we become just like Jesus.

Beautiful picture of a Christ-like person. Amen, Catholica!

success should be counted by how many prayers you've said and how many lives you've changed for the better.

Amen.

agreed 

this should be one of the two main goals of every Christian. The second one should be leading other people to Christ 

that's right Dan K! 

Success... Well, I think that success in Christianity is measured with your close relationship with God. This is the only clue. Look at Jesus and you'll see.

Joy in life - is THE success :)

Following this statement - jokers and comedians are the most successful people in the world )))))))

Don't be so sarcastic, you know what I am talking about :)

comedians are funny NOT joyful (funny for some group of people only)

So define JOY... I think it will be useful for many Christian because they hardly understand the full meaning.

JOY - is not happiness that is for sure, cause it is much more then happiness :)

JOY - is the passion

JOY - is the product of love :)

I guess I gave you plenty of definitions of joy :)

though, languages and words usually flexed by society and people's culture differ its definitions too :)

Success...Let us look up at the Father'right hand order for us to understand.Its still the God standard not the gold standard Godliness with contentment is great gain (1 Tim.6:6).Jesus Christ is more than enough for any sinner. "keep your lives free from the love of moneyand be content with what you have, because GOD has said,"never will I leave you never will I forsake you" succsess def. the state of being contented, satisfaction ease of mind.also read 1 Tim 4:8 Phil. 4:11 thanks.

Success is not difficult to understand - even objectively measure- from hindsight. God, of course, does not rely on hindsight since He dwells simultaneously in the past, present, and the future. So if we could train ourselves to focus our eyes and ears on Him and follow Him by faith and less by sight, we cant' fail by His standards. So the key really is determined by whose standards we may evaluate success: mine, society's, or God's? We can all agree that the answer is obvious. It would sweet, though, to have the three perspectives come together as a united viewing lens once in a while. Like, oh, I like that, society likes that, and God approves all of that and is pleased and honored by it.

Joy is the decision of a person to be content in any situation, even, when there's no apparent reason to be glad. And the foundation of this decision is the realization of the fact that God is in control.

Also, I think, that the true success is visible (especially to ourselves) in our changes since God saved us or since our last rise or fall.