'Boastful' in the Bible

Love endures with patience and serenity, love is kind and thoughtful, and is not jealous or envious; love does not brag and is not proud or arrogant.

But each one must carefully scrutinize his own work [examining his actions, attitudes, and behavior], and then he can have the personal satisfaction and inner joy of doing something commendable without comparing himself to another.

Likewise, you younger men [of lesser rank and experience], be subject to your elders [seek their counsel]; and all of you, clothe yourselves with humility toward one another [tie on the servant’s apron], for God is opposed to the proud [the disdainful, the presumptuous, and He defeats them], but He gives grace to the humble.

These people are [habitual] murmurers, griping and complaining, following after their own desires [controlled by passion]; they speak arrogantly, [pretending admiration and] flattering people to gain an advantage.

And the beast was given a mouth (the power of speech), uttering great things and arrogant and blasphemous words, and he was given freedom and authority to act and to do as he pleased for forty-two months (three and a half years).