Be careful for nothing; but in every thing by prayer and supplication with thanksgiving let your requests be made known unto God.
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Philippians 4:4-8
Tyndale Open Study Notes (CC BY-SA 4.0).
4:6 Believers need not worry about anything because the heavenly Father loves his children and cares about their needs, and he has invited his children to pray about everything (see Matt 6:25-34; 7:9-11; Rom 12:12; Eph 6:18; 1 Thes 5:17; 1 Pet 5:7).
Other Bible passages linked to this one, most cited first.
Trust in the LORD with all thine heart; and lean not unto thine own understanding. In all thy ways acknowledge him, and he shall direct thy paths.
Casting all your care upon him; for he careth for you.
Therefore I say unto you, Take no thought for your life, what ye shall eat, or what ye shall drink; nor yet for your body, what ye shall put on. Is not the life more than meat, and the body than raiment? Behold the fowls of the air: for they sow not, neither do they reap, nor gather into barns; yet your heavenly Father feedeth them. Are ye not much better than they? Which of you by taking thought can add one cubit unto his stature?
Cast thy burden upon the LORD, and he shall sustain thee: he shall never suffer the righteous to be moved.
Pray without ceasing. In every thing give thanks: for this is the will of God in Christ Jesus concerning you.
Ask, and it shall be given you; seek, and ye shall find; knock, and it shall be opened unto you: For every one that asketh receiveth; and he that seeketh findeth; and to him that knocketh it shall be opened.
Authorship: the book itself or Christian tradition. Approximate dates, as in Carson and Moo, An Introduction to the New Testament, and Longman and Dillard, An Introduction to the Old Testament.