I really don't feel confident enough to trust my own discretion.
我真觉得没有足够的信心来相信自己的判断力。
※Discretion is the better part of valour. 小心即大勇。 ※Zeal should not outrun discretion. 热情不应压倒谨慎。 ※The better part of valour is discretion. 小心即大勇. ※An ounce of discretion is worth a pound of wit. 一盎司慎重等于一磅机智。