Being truthful is an integrity most people desire to exhibit,  but unfortunate many end up showing their Adamic nature. My choice above is Education,in which if acquired will bring about comfort, will also bring about getting food as well. Education brings about knowledge in certain issues of live,especially in area of specialization. It help one to be truthful in every endeavor of life, in relation to people, and society. As the Bible expects all believer of Christ to be truthful in all they do. Being fruitful is an act exhibited by true followers of  Jesus Christ.