After an absence of several weeks, despite having shut your room, you will find on your return that a layer of dust has settled over everything. Until the room has been dusted, you will not feel like sitting in it, so displeasing is all this dust. It is just as unpleasant as the dust that is blown in your face by a strong wind. It makes you long for the air to be still once again, so that you may be spared the irritation.
But what is this dust that we find so annoying? It is, in fact, a surface layer of fertile soil, the very substance which enables the growth of all forms of vegetables, fruits and cereals. If this soil did not lie on the face of the earth, it would be impossible for us to live on the earth at all.
It is this same dust that makes the earth's atmosphere dense enough for water to vapourize, forming clouds which release a downpour of water to revive and replenish the earth. Without rain, there would be no life on earth, and rain is only possible because of the dust in the earth's atmosphere.
The redness of the sky which we see at sunrise and sunset is also due to the presence of dust in the atmosphere. In this way dust, besides possessing multiple practical benefits, also contributes to the beauty of the world.
From this straightforward example, we can see how God has placed unpleasant things alongside the pleasant things of life. Just as the rose bush, as well as having exquisite flowers, also has sharp thorns, so also is life composed of an amalgam of both pleasing and displeasing things. This is the way God has created the world. There is nothing we can do but fit in with this order of nature as laid down by Him. Much as we may try, it is impossible for us to have things in any other way.
If you want to complain, you are sure to find plenty to complain about in life. But constantly complaining about things is surely a fruitless exercise. The intelligent thing to do is to forget the unpleasant things which are a part and parcel of life, bury grudges, and carry on seeking to fulfil your true purpose in life.