Prudent

Proverbs 10:19 When words are many, transgression is not lacking, but whoever restrains his lips is prudent. ESV #Bible

What an ability it is to master the tongue. It seems the mouth never runs out of words.
Interestingly the more words used to communicate a point only creates more confusion and misunderstanding.
Then there is the assumption that the one you are talking to knows what you mean rather than what you are saying.
Just in these points made, I can remember times when the communication or discussion turns into an argument and some times an out right fight. That's where transgressions happen.
Restraining our lips for me is to take time to think, not only about what I want to say, but how it will be received. That in it's self is a difficult task, and I have been working on this pretty much my entire life.
The best suggestion I know is those wonderful words "Lord Jesus help me". With God's help we can accomplish many things we think are impossible, and that's prudent.

Believe

John 3:18 Whoever believes in him is not condemned, but whoever does not believe is condemned already, because he has not believed in the name of the only Son of God. ESV #Bible

To believe in Jesus is to consider, to trust in, to rely on, to depend on, be assured of and have faith in Jesus to be the one and only unique Son of God, the Messiah.
It's understandable in the beginning that being moved by a desirous hunger in our  hearts, we believe by our God given faith in Jesus.
As time goes on in our relationship with Jesus through His Holy Spirit we gain experience with and a knowledge of Jesus. As we study the Word of God we learn more about our wonderful Saviour, and our belief grows stronger.
If one chooses through examination, or opinion to not believe, as they live, they are condemned all ready. There is no need for them to die or stand before God pleading, because their disbelief is the witness and proof of their condemnation.
God has left the decision entirely up to us, we make the choice to believe or disbelieve. So there is no blame that can be held against Jesus, or God, we hold the entire responsibility to live forever, or die, meaning separated forever from Jesus.
If you feel inside that God is real, than the only way to God is through Jesus.
Believe and be saved from the deadly separation that awaits those who disbelieve.