The human form of life is, however, not meant for such cheap happiness. The human life is meant for attaining eternal and unlimited happiness by spiritual realization. This spiritual realization is obtained by tapasya or undergoing voluntarily the path of penance and abstinence from material pleasures. Those who have been trained for abstinence in material pleasures are called dhira, or men undisturbed by the senses. -- SB 1.3.13