Why and when to pray?

As written in the scriptures.

Acts 6:4

4 and will give our attention to prayer and the ministry of the word.”

John 14:12-14

12 Very truly I tell you, whoever believes in me will do the works I have been doing, and they will do even greater things than these, because I am going to the Father. 13 And I will do whatever you ask in my name, so that the Father may be glorified in the Son. 14 You may ask me for anything in my name, and I will do it.

Philippians 4:6

6 Do not be anxious about anything, but in every situation, by prayer and petition, with thanksgiving, present your requests to God.

Ephesians 6:18

18 And pray in the Spirit on all occasions with all kinds of prayers and requests. With this in mind, be alert and always keep on praying for all the Lord’s people.

Romans 12:1-2

12 Therefore, I urge you, brothers and sisters, in view of God’s mercy, to offer your bodies as a living sacrifice, holy and pleasing to God—this is your true and proper worship. 2 Do not conform to the pattern of this world, but be transformed by the renewing of your mind. Then you will be able to test and approve what God’s will is—his good, pleasing and perfect will.