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Where can I find information about the fruits of the spirit?

The passage you are looking for would be Galatians 5:16-26, where the "deeds of the flesh" are contrasted with the "fruit of the Spirit." Further, the text you referred to about "by their fruits you shall know them" would be Matthew 7:15-23, and specifically 7:20.

The following messages on the BSF Website deal with these texts:

The Fatal Failures of Religion

The War Without and the War Within - Part 1

The War Without and the War Within - Part 2

Related Topics: Spiritual Gifts, Sanctification