1. By committing to memory
   "she knew the poem by heart"
   - by memory

Encyclopedia: By heart

• pickaninny
• pickax
• pickaxe
• pickelhaube
• picker
• pickerel
• pickerel frog
• pickerelweed
• pickerelweed family
• Pickeringia
• Pickeringia montana
• picket
• picket boat
• picket fence
• picket line
• picket ship
• Pickett
• Pickford
• picking
• pickings
• pickle
• pickle barrel
• pickle relish
• pickled
• pickled herring