'Act' in the Bible

For if the message delivered through angels proved to be true, and every transgression and act of disobedience met with just retribution,

For every High Priest is chosen from among men, and is appointed to act on behalf of men in matters relating to God, in order to offer both gifts and sin-offerings,

Through faith Noah, being divinely taught about things as yet unseen, reverently gave heed and built an ark for the safety of his family, and by this act he condemned the world, and became an heir of the righteousness which depends on faith.