Please help to to paraphrase

south Africa unity is not a dream of a visionary, it is not even the forecast of genius, which makes clear and at hand that which only after ages can accomplish, South Africa unity is a condition the practical necessity for which is daily and hourly forced upon us by the common needs of life: it is the one path open to us. For this unity all great men are born in South Africa during the next century will be compelled directly or indirectly to labour; it is this unity which must preced the production of anything great and beautiful by our people as a whole. it is the attainment of this unity which constitutes the problem of south Africa.