How can little sins affect our salvation?

In Christian theology, particularly within the sovereign grace framework, it is emphasized that even the smallest unrepented sin can have devastating effects on one’s eternal state. 2 Timothy 2:19 reminds us that the Lord knows those who are His, underscoring the necessity for a heart aligned with Him, which includes turning away from all known sin. Little sins can obscure one’s ability to see the need for salvation, leading to the kind of hard-heartedness that rejects God’s grace. Thus, true repentance involves not just acknowledging major sins, but also being vigilant about little ones that can accumulate and lead to spiritual death.