Unbeknown Paedobaptist

I have just started reading a modernized abridgement of a Puritan Classic.
Here are two quotes from the first chapter. See if you can guess who wrote the Puritan Classic of which I am reading a modernized abridgement as well as the title of the classic.
1.

In a word - God, angels and the saints already with the Lord are spectators, watching how you conduct yourself as a child of the most high. This crowd of witnesses shouts joyfully from the celestial sidelines every time you defeat a temptation, scale a difficulty, or regain lost ground from your enemies. And if the fight should be too much for you, your dear saviour stands by with reserves for your relief at a moments notice.

2.

The strength of an earthly general lies in his troops - he flies upon their wings. If their feathers get clipped or their necks broken he is helpless. But in the army of saints, the strength of the whole host lies in the Lord of Hosts. God can overcome His enemies without help from anyone, but His saints cannot so much as defend the smallest outpost without His strong arm.

Both quite encouraging quotes even if you can't guess the author.
There we go, three posts in an evening. Must be a record for me...
Have a good weekend.