on one had Jesus said no one can come to him unless the father draws them - which means that ordinary rational persuasion can't work to bring people to Christ
on the other hand we Catholics have the example of Augustine's mother Saint Monica, she brought her pagan husband and Manichaeism son (Augustine) to Jesus Christ through ceaseless prayer over many years
And I think prayer may be the only way to bring people to God since salvation is a work of the holy spirit and the only way to get God to do something is through prayer