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

Encyclopedia: By heart

• blue jet
• blue joke
• blue law
• blue lotus
• blue mahoe
• blue marguerite
• blue marlin
• blue mockingbird
• blue mold fungus
• blue moon
• blue mould fungus
• Blue Mountain tea
• blue murder
• Blue Nile
• blue note
• blue orchid
• blue pea
• blue peafowl
• blue peter
• blue pickerel
• blue pike
• blue pikeperch
• blue pimpernel
• blue point Siamese
• blue pointed