Hebrews 6:10 makes one of the most direct promises about overlooked faithfulness in Scripture: "For God is not unrighteous to forget your work and labour of love, which ye have shewed toward his name." The Greek epilanthanetai — "forget" — is stated as something God is not capable of doing with your work. It would be unrighteous — adikos — for him to forget. Your work that no one has recognized has been registered by someone who does not operate on the same economy of visibility that human institutions use.
Matthew 6:4 describes the hidden work God rewards: "thy Father which seeth in secret himself shall reward thee openly." The Greek en to krypto — "in secret" — is the structural opposite of the visible, recognized work that generates human approval. Jesus promises that the Father who sees the invisible work will reward it. The economy of divine recognition runs on a different currency than the economy of human approval.
Commentary is from a charismatic Protestant perspective, drawing on KJV text and public-domain sources including Spurgeon, Andrew Murray, and Matthew Henry.