Most people in the world have no experience of lasting joy in their lives. We’re on a mission to change that. All of our resources exist to guide you toward everlasting joy in Jesus Christ.

Pentaprism in camera

Pentaprism for sale

Within these pages Piper shares a series of poems written for his wife, Noël, during the first forty-two years of their relationship, starting from the day of their engagement. In it he provides readers with a taste of one man's tender affections for his wife-poems that he hopes will fan into flame readers' affections for their own spouses and ultimately for the Maker of marriage.

Penta prism's function is to deviate the direction of the light beam by 90 degrees. Penta prism will neither invert nor reverse the image. Penta prisms are extremely useful in alignment systems as they define a right angle very precisely and independently of angle of incidence. Rays entering one face emerge from the adjacent face at precisely 90 deg after they have undergone two reflections inside the prism for a total of 270 deg. The penta prism acts as a turning mirror which is insensitive to alignment.

Beyond the tough love of covenant-keeping is a warmth and tenderness that can't be denied. So while John Piper's This Momentary Marriage focuses on the theological meaning of marriage, its companion volume, Velvet Steel, reveals the rich, emotional dimension.