Details determine the success or failure

My father always tell me "Details determine the success or failure",but i always forget it .i'm so careless that my father always blame me. so when i lost the key of my home ,i'm so afraid my father will blame me. i determine go to Replicate the key in Secretly . Unfortunately things was happened,the key of replication was pack in the hole of key!!!!oh !i'm so Shocked that i forget what should i do.what should i do?? i tell myself you must calm down . i call the person who help me replicate the key.he help me pick the Incomplete key .but my father had known that .he don't blame me .he told me:''now. do you known the meaning of Details determine the success or failure ?