“And he sighed deeply in his spirit, and saith, Why doth this generation seek after a sign? verily I say unto you, There shall no sign be given unto this generation.” - Mark 8v12

Many Christian groups place a huge emphasis on looking for signs from God to determine His will or to look for His approval. Sometimes they even do this when God’s word is clear on an issue, perhaps secretly hoping that God will show them what they want instead of simply obeying His word.

The Pharisees came to Jesus asking for Him to give them some kind of heavenly sign to support His claims. Their lack of faith caused Him to sigh deeply and say, “Why do you seek after a sign?” He went on to tell them that no sign was going to be given to them.

Faith requires acting and believing without seeing anything. Looking for a sign indicates living by sight, not by faith.
We don’t need to see signs from heaven. He has given us His word. That should always suffice.