"Ode to Psyche" was an ode by John Keats.
Sometime prior to 2368, William T. Riker had received a bound copy of this poem as a gift from Deanna Troi. (TNG: "Conundrum")
According to the Star Trek Encyclopedia, 4th ed., vol. 2, p. 99, this was one of six great odes written in 1819 by John Keats.