The Christian Warrior is a short work by the Puritan Isaac Ambrose that was first published in 1660. In 1997 an 1837 edition (abridged, methodised and improved by Thomas Jones of Northampton) was reprinted in hardback by SDG and is still available. It is an excellent little book in the usual Puritan style and is reminiscent of The Christian in complete armour, Precious Remedies against Satan's devices and other books from that period. It begins by reminding us that the Christian life is a battle and goes on to deal with various situations where Satan attacks, giving remedies all the way from infancy to the end of life. It could probably do with some slight editing for repetition but on the whole it is useful book full of helpful pastoral advice and biblical instruction.
Any feeble David may wrestle with Goliath, so long as the battle is the Lord's; and the warrior comes to the field in the name of the Lord of hosts, the God of Israel. p 10
Sin, like a black river of poison, flows from Adam, through one generation after another, to the end of the world. p 21
Holy thoughts are precious things; they are God's messengers; they come from God, and lead to God again. Wherever they are entertained, they bestow exceeding great rewards. Therefore cherish these motions of the Spirit, and know that they come from heaven to benefit thy soul. p 31
The flesh is a worse enemy than the devil himself. p 35