我心眼儿有些小但是不缺
[wŏ xīn yăn ér yŏu xiē xiăo dàn shì bù quē]
'My heart is a little cunning but not lacking' suggests that while the person admits to being somewhat shrewd or sneaky, overall there’s honesty present within them; a nuanced balance between sharpness and sincerity without deceitfulness.