Stubborn as a mule
Mind over matter
An impossibility
Perseverance pays dividends
The walls have ears
Lacking motivation
Better safe than sorry
To kill two birds with one stone
An upright and honorable person
Anything can be fertilizer
dependence
Practice what you preach
tightly packed; packed together
thinking of a close friend who is far away
agonizing over design
Well fed, well bred
To shoot yourself in the foot
To perform an amazing trick
A pointless endeavor
term of endearment for close family