From Mark Booker
Psalms 1-2: The opening two psalms indicate the blessed, or happy, state. In Psalm 1, blessedness comes from delighting in the law (the 'torah' = instruction) of the Lord. The person who meditates on this instruction - that is, someone who chews on the word, mulling it over (think of a cow chewing the cud) - is like a strong and fruitful tree. In Psalm 2, happiness belongs to those who 'take refuge' in the Lord (v12). The Lord's Son will defeat his enemies and enjoy a worldwide reign (v8 - yes, this is pointing to Jesus, as the New Testament repeatedly). Resistance against his rule is futile, so the kings of the earth are called to serve him. All who take refuge in this worldwide king will be happy. Together Psalms 1 and 2 are a great introduction to the main themes of the psalter: delight in God's word and take refuge under his rule. This is the way to happiness, to blessedness.
2 Timothy 3.10-17: When Paul writes that "all Scripture is breathed out by God and profitable for teaching, for reproof, for correction, and for training in righteousness" (v16) the referent of the word "Scripture" is the Old Testament. That should encourage us as we dig into Deuteronomy. This passage is found in the midst of an exhortation to endurance and faithfulness to God and his word in a time when that word is challenged (see 2 Tim 3.1-9 and 4.1-5).