foresee [ fəˈsiː ] They are smart enough to find the cracks, to foresee the challenges, and to talk themselves out of the idea

impenetrable It will not be broken; it will become impenetrable.

void [ vɔɪd ]

intact [ ɪnˈtækt ] If you want to make sure of keeping it intact, you must give your heart to no one, not even to an animal.

unbreakable [ ʌnˈbreɪ.kə.b^əl ] unbreakable glass/plastic | Your heart will become unbreakable

wring(wrung | wrung) [ rɪŋ(rʌŋ) ] Love anything, and your heart will certainly be wrung and possibly be broken.

coffin [ ˈkɑː.fɪn ] lock your heart up safe in the casket or coffin of your selfishness - It will not be broken

irredeemable [ ˌɪrɪˈdiːməbl ] It will not be broken; it will become irredeemable.

entanglement [ ɪnˈtæŋ.ɡ^əl.mənt ] avoid all entanglements | entanglements of cables and wires

uncertainty [ ʌnˈsɜː.t^ən.ti ]

damnation [ dæmˈneɪ.ʃ^ən ] The alternative to tragedy, or at least to the risk of tragedy, is damnation.

supreme [ suːˈpriːm ]

casket [ ˈkæs.kɪt ] lock your hurs up safe in the casket or coffin of your selfishness - It will not be broken

conquer [ ˈkɒŋ.kə^r ] you shall miserably fail or gloriously conquer