Can a command begin and end within {} and {}?

Question

Is there any way to have a command, such as \section{}, begin and end inside two other commands?

\documentclass{article}
    \newcommand{\thisisaspecialcommand}[1]{
        #1
    }
\begin{document}
    \thisisaspecialcommand{\section{} % The section begins here.
    \thisisaspecialcommand{This is the section's title.}
    \thisisaspecialcommand{}} % The section ends here.
    (text)
\end{document}

In this sample code, LaTeX does not understand which { begins the section and which } ends the section.

Answer 1

Maybe you're searching for a kind of environment that uses the body of the environment as the argument of a command. In this case, the package environ may help you:

\documentclass{article}
\usepackage{environ}

\NewEnviron{specialenvironment}{\section{\BODY}}
\begin{document}
\begin{specialenvironment}
Section heading
\end{specialenvironment}
\end{document}

Answer 2

I agree with all the above comments that this does not really make sense, but for what its worth, the code below does seem to achieve the goal stated in the comments:

output will be the same as: \section{This is the section's title}, not an empty section

One change that this requires is that there be a different command inside and outside. So below I have used thisisaDifferentSpecialcommand as the new command that is to be used within the original thisisaspecialcommand. Since you want this output to be identical to a regular \section{This is the section's title.} command, I added it at the beginning so that we can compare the two outputs. The following MWE yields:

\documentclass{article}

\let\OldSection\section% Save definition of \section
\newcommand*{\thisisaDifferentSpecialcommand}[1]{#1}%
\newcommand{\thisisaspecialcommand}[1]{%
    \renewcommand{\section}[1]{}% Disable \section within \thisisaspecialcommand
    \OldSection{#1}% Apply section header
}
\begin{document}
    \section{This is the section's title.}
    (text)

    \thisisaspecialcommand{\section{}% The section begins here.
    \thisisaDifferentSpecialcommand{This is the section's title.}
    \thisisaDifferentSpecialcommand{}}% The section ends here.
    (text)
\end{document}