The Bible, God’s Word, is completely reliable and accurate.
 
Psalms 19:7-8
7 ¶ The law of the LORD is perfect, converting the soul: the testimony of the LORD is sure, making wise the simple.
8 The statutes of the LORD are right, rejoicing the heart: the commandment of the LORD is pure, enlightening the eyes.
 
Psalms 138:2
I will worship toward thy holy temple, and praise thy name for thy lovingkindness and for thy truth: for thou hast magnified thy word above all thy name.
 
2 Timothy 3:16-17
All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness: That the man of God may be perfect, throughly furnished unto all good works.