Matthew 7:7-12, "Ask and it will be given to you; seek and you will find; knock and the door will be opened to you..."
I'm so blessed our LORD has criteria for asking. Does this mean we can ask selfishly and He will answer them? He knows our needs and has already promised us He will supply them. In Philippians 4:19 He tells us, "...God shall supply all your needs according to His riches in Glory by Christ Jesus."
Matthew continues, "If your own son ask for bread, will you give him a stone? Or if he ask for a fish will you give him a snake? You know how to give your children good gifts, how much more will your Father in heaven give good gifts to you who ask Him! So in everything, do to others what you would have them do to you."
We know not to sin in asking GOD for the good things He has promised to us as well as praying GOD's gifts for others. To know GOD's will is to know His salvation in Christ Jesus, and all these other things will be added to you. Matthew 6:33 says, "Seek first the Kingdom of GOD and all these things will be added to you." These things refers to the worries one may have concerning one's own needs.
A famous song has words, "Are you weak and heavy laden with a burden of care? Bring it to the LORD in prayer." He does answer your prayers.