を以て

を以て is a formal, literary way to indicate the means, basis, or authority for something. It marks the basis or method used to achieve or decide something—similar to “by means of,” “with,” or “on the basis of.” It tends to appear in written Japanese, official statements, or solemn contexts. It is not common in everyday casual speech. The verb or clause that follows often expresses a conclusion, decision, action, or statement that relies on the preceding noun as the basis or instrument.