Read it through once

"Tryin' ain't de thing. You's gwyne to do it. You ain't gwyne to steal a pin--'ca'se it ain't safe no mo'; en you ain't gwyne into no bad comp'ny--not even once, you understand; en you ain't gwyne to drink a drop--nary single drop; en you ain't gwyne to gamble one single gamble--not one! Dis ain't what you's gwyne to try to do, it's what you's gwyne to do. En I'll tell you how I knows it. Dis is how. I's gwyne to foller along to Sent Louis my own self; en you's gwyne to come to me every day o' yo' life, en I'll look you over; en if you fails in one single one o' dem things--jist one--I take my oath I'll come straight down to dis town en tell de Jedge you's a nigger en a slave--en prove it!" She paused to let her words sink home. Then she added, "Chambers, does you b'lieve me when I says dat?"