Everyone teaches, regardless of whether teaching is their profession. Mothers and fathers naturally teach. Brothers and sisters teach. Spouses, friends, employers, acquaintances, strangers, children--no matter who you are or what your situation is in life, someone is watching and learning from you. Conversely, you learn from those around you.
What are good illustrations of teaching and learning? Let's pull out those snappy metaphors, and reach beyond the gardener and plant!
Here's mine: Teaching is like stocking a vast grocery store--displaying the fresh fruits and vegetables in the most appealing way possible. Learning is taking the produce home and creating spectacular dishes.