أَلَمْ تَرَ كَيْفَ ضَرَبَ اللَّهُ مَثَلًا كَلِمَةً طَيِّبَةً كَشَجَرَةٍ طَيِّبَةٍ أَصْلُهَا ثَابِتٌ وَفَرْعُهَا فِي السَّمَاءِ

In the present world Almighty God has appointed outward symbols for different realities. For example, a good tree is a symbolic representation of the believer. It is the special characteristic of a tree that it makes the whole world its ‘dining table’, and in this way develops from the stage of a seed to establish itself on the earth as a majestic tree. The tree absorbs from the earth water, minerals and salts in order to grow: at the same time it obtains nourishment from the air and light from the sun. It takes nourishment from below as well as from above. Using all these through the process of photosynthesis, the tree is able to make food throughout. This is what is meant by yields its fruit all the time. This is also true of the believer. While the common tree is materially a tree, the believer is a conscious tree. The believer observes in the world God’s creation and, looking to the system governing it, derives from it a proper lesson and guidance. Moreover, he continuously receives God’s blessing from ‘above’. Fruit ripens on the tree in the proper season. Similarly, a believer adopts such behaviour as is proper for every occasion. Whether it is under economic constraints or in economic prosperity; whether it is in a moment of happiness or sorrow; whether it is a matter for complaint or commendation, whether it is in a condition of strength or weakness, on every occasion his language and behaviour express the reverence which he is expected to show as a true subject of God. The opposite example is that of the evil tree, i.e. the wild bush. Its appearance suggests that it is provided with extremely unwholesome food, as a result of which it is covered with thorns, and bitter fruits with an unpleasant taste grow on its branches. It receives anyone who goes near it with a bad smell. Nobody likes such a tree. Wherever it grows, it is uprooted and thrown away. This is the case with the unbeliever, who from the beginning has always been persona non-grata on this earth. To him, the universe, despite its superlative features, has no argument in its favour and teaches no lesson. Though there is no end to the liberality of God’s blessings, he has no share in them; God’s magnanimity is not reflected in his character or his dealings.

— Source: Tazkirul Quran (Maulana Wahiduddin Khan) via Quran.com (14:24)