tat-for that (sense gratification and economic development); prayasah-endeavor; na-not; kartavyah-to be done; yatah-from which; ayuh-vyayah-waste of the duration of life; param-only or ultimately; na-nor; tatha-in that way; vindate-enjoys; ksemam-the ultimate goal of life; mukunda-of the Supreme Personality of Godhead, who can deliver one from the material clutches; carana-ambujam-the lotus feet.