Definition and Overview:
Presumption, in a biblical context, refers to the act of taking liberties or assuming a position or privilege without proper authority or warrant. It often involves overstepping boundaries, acting with unwarranted confidence, or making assumptions about God's will without seeking His guidance. Presumption is considered a sin because it reflects a lack of humility and a disregard for God's sovereignty and wisdom.

Biblical Examples:

1. King Saul's Sacrifice (1 Samuel 13:8-14): King Saul exemplifies presumption when he offers a burnt offering in Samuel's absence, assuming the role of a priest, which was not his to take. Saul's impatience and lack of trust in God's timing led to his downfall. Samuel rebukes Saul, saying, "You have acted foolishly; you have not kept the command the LORD your God gave you" (1 Samuel 13:13).

2. Uzzah and the Ark (2 Samuel 6:6-7): Uzzah's presumption is evident when he touches the Ark of the Covenant to steady it, despite God's explicit instructions that no one should touch it. His action, though seemingly well-intentioned, resulted in his immediate death, highlighting the seriousness of presuming upon God's commands.

3. The Israelites' Presumptuous Battle (Numbers 14:39-45): After refusing to enter the Promised Land due to fear, the Israelites later attempt to go to battle without God's blessing. Moses warns them, "Do not go up, for the LORD is not among you," but they proceed presumptuously and are defeated (Numbers 14:42).

Warnings Against Presumption:

1. Proverbs 16:18: "Pride goes before destruction, and a haughty spirit before a fall." Presumption often stems from pride, leading individuals to act without seeking God's guidance or acknowledging their limitations.

2. James 4:13-16: James warns against making plans without considering God's will, stating, "Instead, you ought to say, 'If the Lord is willing, we will live and do this or that'" (James 4:15). This passage underscores the importance of humility and dependence on God.

3. Psalm 19:13: The psalmist prays, "Keep Your servant also from willful sins; may they not rule over me. Then I will be blameless and cleansed of great transgression" . This plea highlights the need for divine help in avoiding presumptuous sins.

Consequences of Presumption:

1. Divine Judgment: As seen in the examples of Saul and Uzzah, presumption can lead to severe consequences, including divine judgment and loss of favor with God.

2. Loss of Blessings: The Israelites' presumptuous attempt to enter the Promised Land resulted in defeat and a prolonged wilderness journey, illustrating how presumption can lead to missed blessings and opportunities.

3. Spiritual Blindness: Presumption can blind individuals to their need for God's guidance and wisdom, leading to poor decision-making and spiritual stagnation.

Avoiding Presumption:

1. Seek God's Guidance: Regular prayer and consultation with Scripture are essential in discerning God's will and avoiding presumptuous actions.

2. Cultivate Humility: Recognizing one's limitations and the need for God's wisdom helps prevent the pride that often leads to presumption.

3. Obey God's Commands: Adhering to God's instructions and respecting His established order are crucial in avoiding the pitfalls of presumption.

In summary, the Bible provides numerous warnings and examples illustrating the dangers of presumption. It calls believers to a life of humility, obedience, and reliance on God's wisdom and guidance.