it is the cross and the cross alone that spares the life of anybody who ever sins at any time. It is only because of the work of the cross that God can even tolerate sin in any shape or in any sense. Now that, therefore, I put under the heading of common blessing. And let us be careful to emphasise that even the unbeliever derives that blessing from the cross. The fact that he is not cut off immediately is entirely due to that. It is in the light of the cross that God can exercise His patience towards those who are opposed to Him and remain finally impenitent.
If there is a distinction between this parable and the last one, it is that the mustard seed suggests extensive growth and the yeast intensive transformation.