In both sacraments the death-bed baptism of an earlier age seems to survive, and they both fulfil a deep-seated need of the human spirit.
The extent of development of the phelloderm is dependent upon whether the phellogen has a superficial or a deep-seated origin.
Hence there is clearly a deep-seated difference between the religious feelings of the two continents.
As early as 1804, Humboldt expressed the opinion that petroleum was produced by distillation from deep-seated strata, and Karl Reichenbach in 1834, suggested that it was derived from the action of heat on the turpentine of pine-trees, whilst Brunet, in 1838, adumbrated a similar theory of origin on the ground of certain laboratory experiments.
Koheleth's scepticism (in the original form of Ecclesiastes) is deep-seated and far-reaching: though he is a theist, he sees no justice in the world, and looks on human life as meaningless and resultless.