What is the meaning of [The younger brother the better gentleman]

“The Elder Brother of a Houfe depending on his Efiate, is either indulged by Parents, or gives up himfelf to an indolent Humour, that his Soul in his Body, like a Sword in the Scabbard, rufis for want of life, thinking‘ his Efiate fuflicient to gentilize him, if he have but only the Accompliihment of a Fox-Hunter, or a Country Juftice; the Younger Brother being put to his fhifts, having no Inheritance to depend upon, by plying his Studies hard at Home, and accompliihing himfelf by Travels Abroad, oftentimes, either by Arts or Arms, raifes himfelf to a confpicuous pitch of Honour, and fo becomes much the better Gentleman.”