Psalms 19:7 The law of the LORD is perfect, converting the soul: the testimony of the LORD is sure, making wise the simple.
116:6 The LORD preserveth the simple: I was brought low, and he helped me.
119:130 The entrance of thy words giveth light; it giveth understanding unto the simple.

Proverbs 1:4 To give subtilty to the simple, to the young man knowledge and discretion.
  22 How long, ye simple ones, will ye love simplicity? and the scorners delight in their scorning, and fools hate knowledge?
  32 For the turning away of the simple shall slay them, and the prosperity of fools shall destroy them.
7:7 And beheld among the simple ones, I discerned among the youths, a young man void of understanding,
8:5 O ye simple, understand wisdom: and, ye fools, be ye of an understanding heart.
9:4 Whoso is simple, let him turn in hither: as for him that wanteth understanding, she saith to him,
  13 A foolish woman is clamorous: she is simple, and knoweth nothing.
  16 Whoso is simple, let him turn in hither: and as for him that wanteth understanding, she saith to him,
14:15 The simple believeth every word: but the prudent man looketh well to his going.
  18 The simple inherit folly: but the prudent are crowned with knowledge.
19:25 Smite a scorner, and the simple will beware: and reprove one that hath understanding, and he will understand knowledge.
21:11 When the scorner is punished, the simple is made wise: and when the wise is instructed, he receiveth knowledge.
22:3 A prudent man foreseeth the evil, and hideth himself: but the simple pass on, and are punished.
27:12 A prudent man foreseeth the evil, and hideth himself; but the simple pass on, and are punished.

Ezekiel 45:20 And so thou shalt do the seventh day of the month for every one that erreth, and for him that is simple: so shall ye reconcile the house.

Romans 16:18 For they that are such serve not our Lord Jesus Christ, but their own belly; and by good words and fair speeches deceive the hearts of the simple.
  19 For your obedience is come abroad unto all men. I am glad therefore on your behalf: but yet I would have you wise unto that which is good, and simple concerning evil.