In Book Five of the Psalms, Psalms 113-118 (sometimes termed the Hallel) are to be considered one continuous Psalm of praise, associated with the holy days.
Paul wrote some of his most optimistic letters from prison, under the possibility of execution, but absolutely convinced that ultimate victory was imminent.
Satan was first named Helel, or 'son of the dawn.' When Jerome translated the Hebrew into Latin, he named him Lucifer, or light-bringer, a title of Christ!
Winter is a time of cold, darkness, and sadness. As many as 10% of people in northern areas have Seasonal Affective Disorder. The Psalms for winter can help.