A great many so-called 'sacred songs' are so plaintive and pathetic that they help to give a gloomy idea of religion. Now _don't_ sing these; come out boldly, and sing definitely and unmistakeably for your King, and of your King, and to your King. You will soon find, and even outsiders will have to own, that it is a _good_ thing thus to show forth His loving-kindness and His faithfulness (see Ps. xcii. 1-3).
Here I am usually met by the query, 'But what would you advise me to sing?' I can only say that I never got any practical help from asking any one but the Master Himself, and so I would advise you to do the same! He knows exactly what will best suit your voice and enable you to sing best for Him; for He made it, and gave it just the pitch and tone He pleased, so, of course, He is the best counsellor about it. Refer your question in simplest faith to Him, and I am perfectly sure you will find it answered. He will direct you, and in some way or other the Lord will provide the right songs for you to sing. That is the very best advice I can possibly give you on the subject, and you will prove it to be so if you will act upon it.
Only one thing I would add: I believe there is nothing like singing His own words. The preacher claims the promise, 'My word shall not return unto Me void,' and why should not the singer equally claim it? Why should we use His own inspired words, with faith in their power, when speaking or writing, and content ourselves with human words put into rhyme (and sometimes very feeble rhyme) for our singing?
What a vista of happy work opens out here! What is there to prevent our using this mightiest of all agencies committed to human agents, the Word, which is quick and powerful, and sharper than any two-edged sword, whenever we are asked to sing? By this means, even a young girl may be privileged to make that Word sound in the ears of many who would not listen to it otherwise. By this, the incorruptible seed may be sown in otherwise unreachable ground.
It is a remarkable fact that it is actually the easiest way thus to take the very highest ground. You will find that singing Bible words does not excite the prejudice or contempt that any other words, sufficiently decided to be worth singing, are almost sure to do. For very decency's sake, a Bible song will be listened to respectfully; and for very shame's sake, no adverse whisper will be ventured against the words in ordinary English homes. The singer is placed on a vantage-ground, certain that at least the words of the song will be outwardly respected, and the possible ground of unfriendly criticism thus narrowed to begin with.
But there is much more than this. One feels the power of His words for oneself as one sings. One loves them and rejoices in them, and what can be greater help to any singer than that? And one knows they are true, and that they cannot really return void, and what can give greater confidence than that? God _may_ bless the singing of any words, but He _must_ bless the singing of His own Word, if that promise means what it says!
The only real difficulty in the matter is that Scripture songs, as a rule, require a little more practice than others. Then practise them a little more! You think nothing of the trouble of learning, for instance, a sonata, which takes you many a good hour's practice before you can render it perfectly and expressively. But you shrink from a song, the accompaniment of which you cannot read off without any trouble at all. And you never think of such a thing as taking one-tenth the pains to learn that accompaniment that you took to learn that sonata! Very likely, too, you take the additional pains to learn the sonata off by heart, so that you may play it more effectively. But you do not take pains to learn your accompaniment by heart, so that you may throw all your power into the expression of the words, undistracted by reading the notes and turning over the leaves. It is far more useful to have half a dozen Scripture songs thoroughly learnt and made your own, than to have in your portfolios several dozen easy settings of sacred poetry which you get through with your eyes fixed on the notes. And every one thus thoroughly mastered makes it easier to master others.