Psalm 18:26

... to the pure you show yourself pure, but to the devious you show yourself shrewd.

to the pure you show yourself pure 
Proverbs 15:26  The LORD detests the thoughts of the wicked, but gracious words are pure in his sight.
Matthew 5:8  "Blessed are the pure in heart, for they will see God."
Philippians 1:9-11  And this is my prayer: that your love may abound more and more in knowledge and depth of insight, so that you may be able to discern what is best and may be pure and blameless for the day of Christ, filled with the fruit of righteousness that comes through Jesus Christ--to the glory and praise of God.
1 Timothy 5:22  Do not be hasty in the laying on of hands, and do not share in the sins of others. Keep yourself pure.
Titus 1:15  To the pure, all things are pure, but to those who are corrupted and do not believe, nothing is pure. In fact, both their minds and consciences are corrupted.
1 John 3:1-3  See what great love the Father has lavished on us, that we should be called children of God! And that is what we are! The reason the world does not know us is that it did not know him. Dear friends, now we are children of God, and what we will be has not yet been made known. But we know that when Christ appears, we shall be like him, for we shall see him as he is. All who have this hope in him purify themselves, just as he is pure.

but to the devious you show yourself shrewd 
Proverbs 3:34  He mocks proud mockers but shows favor to the humble and oppressed.
Matthew 10:16  "I am sending you out like sheep among wolves. Therefore be as shrewd as snakes and as innocent as doves."
Luke 16:8  "The master commended the dishonest manager because he had acted shrewdly. For the people of this world are more shrewd in dealing with their own kind than are the people of the light."

Scriptures taken from the Holy Bible, New International Version® NIV®, Copyright© 1973, 1978, 1984, 2011 by Biblica, Inc.® Used by permission. All rights reserved worldwide. 
Limited to 15 verses per post.