John 4

39Many of the Samaritans from that town believed in him because of the woman's testimony[...]
41And because of his [Jesu´s] words many more became believers.

It seems that we can reach something with our testimony and own words. But the word of God is most powerful and convincing.
It also seems that the people first had to hear about Jesus and her testimony and than comming to Jesus. They neede someone to guide them. And it does not matter in which bad social position she was. She had no friend or was respected in town but still she was able to give the people the opportunity to be saved.

14 [...] I give him will become in him a spring of water welling up to eternal life

Where is the spring, when we feel thirty and longing for somthing? Are we just sitting on it and blocking the water or did we already walked too far away?
Actually there is no need anymore to feel thirsty cause we were given an source. So it is not only moving oneself to some special place as
"21 [...] a time is coming when you will worship the Father neither on this mountain nor in Jerusalem." because
^"24God is spirit, and his worshipers must worship in spirit and in truth."